INTEGRABLE LOAD VOLTAGE SAMPLING CIRCUIT FOR EFFECTIVE VALUE LOAD AVERAGE VOLTAGE CONTROLLER

摘要

An integratable load voltage sampling circuit utilizes a plurality of current-mirrors. One of the current mirrors is switched into conduction during a load-current conduction time interval, while another current mirror operates during the entire source half-cycle during which the first current mirror is pulsed to conduct. The total current from the plurality of current mirrors is summed and compared to a reference level; the difference in magnitude between the sampled and reference values is integrated, with respect to time, to provide a load conduction-angle adjustment signal having a magnitude varying as the root-mean-square magnitude of the average load voltage.